Document Detail

Coactivation of the shoulder and arm muscles during closed kinetic chain exercises on an unstable surface.
MedLine Citation:
PMID:  21298239     Owner:  NLM     Status:  In-Data-Review    
Introduction: The purpose of this study was to compare the electromyography index of muscle coactivation of the following muscle pairs: posterior deltoid and pectoralis major (PD/PM); triceps brachii and biceps brachii (TB/BB); and serratus anterior and upper trapezius (SA/UT) during three different closed kinetic chain exercises (wall-press, bench-press and push-up) on an unstable surface at the maximal load. Methods: A total of 20 healthy sedentary men participated in the study. Integral linear values were obtained from three sustained contractions of six seconds each for the three proposed exercises. Mean coactivation index values were compared using the mixed-effects linear model, with a five percent significance level. Results: Electromyography indexes of muscle coactivation showed significant differences for the PD/PM and TB/BB muscle pairs. No differences were found between exercises for the SA/UT muscle pair. Conclusion: Our results seem to differ from those of previous studies, which reported that the similarity in exercises performed is responsible for the comparable muscle activation levels.
R Andrade; R C Araújo; H T Tucci; J Martins; A S Oliveira
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Singapore medical journal     Volume:  52     ISSN:  0037-5675     ISO Abbreviation:  Singapore Med J     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-02-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404516     Medline TA:  Singapore Med J     Country:  Singapore    
Other Details:
Languages:  eng     Pagination:  35-41     Citation Subset:  IM    
Ribeirão Preto Medical School, University of São Paulo, Av Bandeirantes, 3900 Monte Alegre, Ribeirão Preto, São Paulo 14390-900, Brazil.
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